Hulung-machine



Patented Apr. 8, 1890.

H. B. STEVENS. HULLING MACHINE.

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AUMTED STATES PATnN'r` OFFICE.

HENRY B. STEVENS, OF BUFFALO, ASSIGNOR TO THE GEORGE L. SQUIRE MANUFACTURING COMPANY, OF EVANS, NEW YORK.

HULLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 425,111, dated April 8, 1890. Application filed October 4, 188W]` Serial No. 215 ,210. (No model.)

To all whom it may concern,.-

Be it known that I, HENRY B. STEVENS, of the city of Buffalo, in the county of Erie and 'State of New York, have invented new and useful lmprovem ents in llulling-lvlachines, of which the following is a specification.

My invention relates to that class of hulling-machines which are more particularly designed for hullin g rice and which are provided with a stationary stone and a revolving stone of disk form.

Natural stones which are adapted for hulling rice are rare, and they are only efficient when comparatively large stones are used. Such stones are .expensive and render the hulling-machines in which t-hey are used so costly that they are beyond the means of small planters. Such stones also require frequent dressing, which makes it expensive to keep the machines in working order.

The principal object of my invention is to overcome these difficulties by aconstruction of the machine which permits of the use of artiiicial stone for the hulling-disks- Another object of my invention is to provide improved devices for feeding the grain to the machine, adjusting the hulling-disks, and dischargingthe grain from the machine.

My invention consists of the improvements which will be hereinafter fully set forth, 'and pointed out in the claims.

In the accompanying drawings, Figure l is a sectional elevation of ahullingdnachine provided with my improvements. Fig. 2 is a horizontal section in lineoc, Fig. 1, with the cover of the curb removed. Fig. 3 is a horizontal section in line y y, Fig. l. Fig. et is a vertical section in line ,e z, Fig. 3, on an enlarged scale.

Like letters of reference refer to like parts in the several figures.

A represents the base-plate of the machine, and a a the legs, resting on the base-plate.

b represents the horizontal driving-shaft, journaled in a bearing b', formed on the leg a, and provided at its outer end with tight and loose pulleys B B.

C is a bevel-wheel secured to the inner end 0f the shaft h and meshing with a bevel-pin ion c, which is mounted upon the vertical spindle D by means of a feather d, which moves loosely in a long groove in the shaft, so that the spindle can be vertically adj usted in the pinion.

F represents a bridge-tree secured to the base-plate A and provided with a bearing f, in which the spindle D is j ournaled.

j represents an oil-cup formed in the upper side of 111e bridge-tree F and surrounding the hub of the pinion c above the bearing f.

G represents a step-bearing, in which the lower end of the spindle is support-ed and which is provided with an external screwthread. The latter engages in an internallythreaded hub g, formed on the base-plate A, so that by turning the step-bearing Gthe latter and the spindle are raised or lowered. The step-bearing G is provided at its upper end with a hand-wheel g', by which it can be turned. This hand-wheel is provided in its rim with notches, in which engages a latch or stop-pawl g2, pivoted to the bridge tree F, whereby the step-bearing is held against accidental displacement.

h is an angular socket formed in the under side of the step-bearing G, and H is a wrench or key, which can be inserted into said socket for turning the step-bearing from below the iioor on which the machine is mounted. Vhen the hulled grain is spouted from the machine to the floor below, the operator, standing on the lower iioor, can adjust the spindle upon releasing the latch g2, which is for this purpose provided with a pull-rope den pending through an opening in the floor.

I represents the upper stationary hullingdisk, and J the lower rotary disk, which latter is secured to the upper end of the spindle D. The upper disk l is composed of an annular hullingplate ci, composed of artificial stone and made comparatively light or thin, and a metallic supporting-plate i', to the un der side of which the stone plate t' is secured by a suitable cement or glue and by bolts 7c. The heads of the latter are countersunk in the stone plate to such a depth that the plate will be practically worn out when it has become worn to the heads of the bolts. The metallic plate e" is provided at its periphery with upwardly and outwardly extending arms L, which carry vertical set-screws Z, by which the plate is supported upon the curb L. The latter rests in turn upon the upper edge of the delivery-hopper L2, to which it is secured by suitable bolts. The hopper L? is arranged underneath the hulling-disks and is supported by the legs a a.

M represents the teed-hopper, resting upon the top plate Z of the curb L and provided with a discharge-tube in., which enters a sleeve m', projecting upwardly from the central eye of the supporting-plate i of the upper hulling-disk. i

n represents a tubular feed-gate arranged in the discharge-tube m of the feed-hopper and made vertically adjustable therein by an adjusting-screw n', which is secured to the gate n and passes through a bridge-piece n2, secured in the feed-hopper.

The lower helling-disk J consists of a similar annular hulling-platej, of artificial stone, made comparatively light or thin, and a me tallie supporting-disk j', to which the stone plate j is secured by a suitable cement or glue and by countersunk boltsjz. The lower hullingsdisk J is provided with a central feed-plate j, whose surface is depressed be low the surface of the annular stone pl ate j and which receives the grain from the feedgate n.

O represents a pin or agitator secured to the lower hulling-disk and projecting` into the feed-gate for the purpose of agitating` the grain in the latter and facilitating the discharge of the grain.

p represents handles formed on the upper hulling-disk I for lifting` it from its supports when desired. The top plate Z ot the curb L rests loosely on the rim of the latter to permit lthe removal of the hulliug-disks.

Q represents a bridge-tree secured to the inner side of the delivery-hopper L2 and provided with a bearing q, in which the upper portion of the spindle is journaled. 'lhehopper L2 is provided on one side of the spindle with a discharge-sliout q', through which the hulled `grain escapes.

q2 represents a bearing formed in the lower portion of the delivery-hopper L2 for the su pport of the spindle.

The annular stone plates of the hullingdisks, when made of artificial stone, may be molded of any desired diameter and thickness for large orsmall machines, thus rendering it possible to produce hulling-maehines ot this kind at a comparatively small cost.

These artitieial-stone disks can be molded of emery, corundum, quartz, or any suitable material which is most el'iieient in hulling rice or the particular kind of grain for which the machine is designed. They remain in working condition 'for a lon time without re-dressing, and they are easily removed when worn out. i

The upper disk I is adjusted or trammed by means of the screws Z and the lower disk J' by means of the adjustable step G. flhese adjusting devices enable the operator to regulate the position of the disks to a nieety,which is very important in hulling rice, because dilerent kinds of rice require diiterent adj ust-ment of the disks, the differences in the various positions ot the disks being very fine and yet very importantin their effect upon the operation of hulling.

The oil which is supplied to the cup f at the upper end ofthe bearingj` lubrieates the latter and the base of the pinion c, as well as the adjustable step G.

I claim as my in Ventionl. The combination, with the lower disk J and spindle I), of a fixed screw-nut g, the screw-thresulcd step-bearing G, provided with a notched hand-wheel g', a stop-pawl g2, engaging with said wheel, a socket 7L, formed on the under side of the step-bearing, and a detachable wrench ll, adapted to be inserted in said socket for adjusting said bearing from below, substantially as set forth.

2. The combination, with the lower disk .l and the pinion c, of the spindle l), capable of longitudinal movement in said pinion, a bridge-tree F, provided with a bearing f below said pinion, an oil-cup f', arranged above said bearing and surrounding the lower portion of the pinion, a fixed screwnut g, arranged below said bridge-tree, a screw-threaded stepbearing G, arranged in said nut and receiving the lower end ot' said spindle, a handwheel y', secured to said bearing, and a stoppawl g2, engaging in notches formed in the rim of said hand-wheel, substantially as set forth.

fitness my hand this 25th day of September, issu. f

ll. ll. STEVENS.

\Vitnesses:

Oscar. ScHAUn, JN0. J. )Ion-Nan.

ICO 

